Strapless XR Viewer With Head Tracking for Wide Field of View
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Solution Overview
Problem
Conventional VR headsets require headstraps that cause discomfort and restrict the field-of-view, limiting immersive experiences due to weight and size constraints, and pose safety risks in environments requiring extended use.
Innovation Solution
A strapless extended reality viewer system using ego-motion estimation and direct mechanical linkage for head motion compensation, enabling a wider field-of-view and improved image quality without headstraps, with integrated safety features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If headstraps are used to affix the display to the user's head, then the device can be securely positioned, but the user experiences discomfort due to pressure on the face and head
Solution Approach 1:
The patent removes the headstrap component entirely from the system. Instead of securing the display to the user's head with straps, the system uses a camera to track the user's head movements and dynamically adjusts the display position to follow the head, eliminating the need for physical attachment and thus eliminating the harmful pressure on the user's face and head.
Solution Approach 2:
The patent replaces the mechanical headstrap attachment system with an optical tracking system. A camera captures the user's head position and movements, and this visual information is processed to control the display position, substituting mechanical force-based positioning with optical field-based tracking and control.
2Weight of moving object
If the weight and size of the VR headset are reduced, then the device becomes more comfortable to wear, but the field-of-view is considerably limited
Solution Approach 1:
The patent replaces the traditional mechanical headset structure that physically covers the user's eyes with a camera-based optical tracking system. This substitution allows the display to be positioned independently without the weight constraints of a headset, enabling a larger field-of-view while maintaining comfort since no heavy structure needs to be worn on the user's head.
3Area of moving object
If the display is positioned closer to the user's eyes to improve image quality, then the field-of-view increases, but the device exerts more torque on the user's head and neck
Solution Approach 1:
The patent extracts the display from the headset structure and positions it independently in space, allowing it to be placed at the optimal distance from the user's eyes without being constrained by headset weight. The camera tracks the user's head movements to maintain proper positioning, eliminating the torque problem that would result from having a heavy headset positioned close to the eyes.
Solution Approach 2:
The patent introduces a camera as an intermediary between the user's head and the display. The camera captures head position information and transmits it to the display control system, which then adjusts the display position accordingly. This intermediary enables the display to follow the user's head movements without physical attachment, avoiding the torque issue while maintaining optimal viewing distance.
4Reliability
If headstraps are used to secure the device, then the display can be maintained at a stable position, but the user experiences motion sickness during extended use
Solution Approach 1:
The patent transitions from a static display position (fixed by headstraps) to a dynamic display position that actively follows the user's head movements in real-time. The camera continuously tracks the user's head position and the display adjusts accordingly, creating a dynamic system that adapts to user movement rather than forcing the user to adapt to a fixed display position, thereby reducing motion sickness.
Solution Approach 2:
The patent replaces the mechanical headstrap positioning system with an optical tracking and electronic control system. The camera captures head movements and the control system adjusts the display position electronically, substituting the rigid mechanical positioning that caused motion conflicts with a flexible optical-electronic system that can adapt to user movements, reducing motion sickness during extended use.
Data Source
AI summary
A device including a processor configured to: receive sensor measurements; determine a viewer position based on the received sensor measurements; generate a control signal based on the viewer position; and determine a view based on the viewer position.